Selective hydrogenation technology of hydrocarbon material flow rich acetylene in hydrocarbon

A selective hydrogenation and process technology, applied in the direction of selective hydrogenation refining, etc., can solve the problem of catalyst loss of activity and can only be counted by months or even weeks, so as to reduce the loss of palladium, prolong the life, and reduce the temperature rise Effect

Inactive Publication Date: 2005-03-09
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

Because the concentration of alkyne and butadiene in the material is too high, the general process will gradually lose its activity after a period of operation, and the life of the catalyst can only be counted in months or even weeks, and the reaction of diene and alkyne The polymerization of hydrocarbons is also relatively serious, so the post-hydrogenation is rarely reported

Method used

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  • Selective hydrogenation technology of hydrocarbon material flow rich acetylene in hydrocarbon
  • Selective hydrogenation technology of hydrocarbon material flow rich acetylene in hydrocarbon

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Embodiment 1

[0016] The feedstock of this embodiment is the material rich in alkyne, the alkyne hydrogenation reactor adopts palladium-copper bimetallic catalyst, its content is palladium 0.2wt%, copper 10.9wt%, catalyst carrier is alumina, hydrogenation reactor is Single-stage adiabatic fixed-bed reactor, the inlet temperature is 20°C, the pressure is 2.0MPa, and the liquid volume space velocity of alkyne-rich material is 2.0h -1 , the molar ratio of hydrogen to alkyne is 1:1~2:1, and the circulation ratio is 8:1. Table 1 lists the composition of materials before and after the reaction.

[0017] Table 1 Composition of materials before and after reaction

[0018] wt% 1,3-butadiyne Vinyl ethyl acetylene Alkyne 1,3-butadiyne trans

[0019] Alkene Acetylene Total Alkene Yield Conversion Rate

[0020] Raw materials 25.62 7.81 19.94 9.08 36.83 - -

[0021] Product (500 hours) 25.15 - 0.30 0.22 0.52 98.2% 98.58%

[0022] Product (1000 hours) 25.10 - 0....

Embodiment 2

[0025]In this embodiment, the feed is a material rich in alkyne, and the alkyne hydrogenation reactor adopts a palladium-copper-silver multimetal catalyst, the content of which is 0.2wt% of palladium, 9.5wt% of copper, and 0.2wt% of silver, and the catalyst carrier is alumina , the hydrogenation reactor is a double-stage adiabatic fixed-bed reactor, the inlet temperature of the first stage bed is 18°C, the inlet temperature of the second stage bed is 25°C, the pressure is 2.5MPa, and the liquid volume space velocity of the high alkyne material is 2.0h -1 , the hydrogen enters a bed and a second bed respectively in two ways, and the molar ratio of hydrogen to alkynes in each bed is 1:1 to 2:1, and the circulation ratio is 12:1. Table 2 lists the ratio of materials before and after the reaction. composition.

[0026] Table 2 Composition of materials before and after reaction

[0027] 1,3-D

[0028] ...

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Abstract

A process for selectively hydrogenating the hydrocarbon material rich in acetylene hydrocarbon, which is the residue in butadiene extractor, features that said hydrocarbon material flows through a fixed-bed hydrogenating reactor with circulator, where acetylene hydrocarbon reacts on H2 to remove the acetylene hydrocarbon, and then back to said butadiene extractor.

Description

technical field [0001] The invention relates to a method for treating mixed hydrocarbons rich in vinyl acetylene, butyne and propyne remaining in a butadiene extraction device. In particular, the present invention relates to a mixture rich in alkynes passing through a fixed-bed hydrogenation reactor with a circulation device, selectively hydrogenating hydrogen in a liquid state so that hydrogen reacts with alkynes to remove alkynes, and the reaction product is returned to butane The method of ene extraction device. Background technique [0002] During the thermal cracking of oil products to olefins, saturated hydrocarbons such as ethane, propane, butane, etc.; unsaturated hydrocarbons, such as ethylene, propylene, butadiene, butene, etc.; and highly unsaturated hydrocarbons, such as Acetylene, propyne, butyne, vinyl acetylene, etc. [0003] When the ethylene cracking unit co-produces C4 hydrocarbons, the resulting cracked C4 hydrocarbons contain about 40-60 wt% of 1,3-buta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/32
Inventor 王迎春崔云梓张金永陈国鹏高步良郝兴仁魏健刚王林宏
Owner CHINA PETROLEUM & CHEM CORP
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